@Michael LongWow. I need to pay closer attention and get this situation taken care of asap.
The incident started with contractor removing and installing bathroom tile due to leakage to unit below. The work was done over several days.
The tenants has been in the building long before I came along. So the unit needs repairs and updates. He is reluctant to these changes unless he or contractors he knows can do the work. I went up there with a plumber. He was aware that the plumber and I would be in the unit. He was there when we arrived. I noticed padlocks on living room, bedroom and bathroom doors. At that point, I did not bring it to his attention.
However, later I called him for a meeting as he complained to the contractor being in the unit. I addressed the concern of the padlock. He reason was that, I don't want anyone in my personal spaces when you or I are not here to supervise the work. He refused to remove them.
I cannot supervise all work as I'm employed full time and this is a one person operation at this time.
Question for a future situation: What can I do to when having contractors, handyman, etc in without supervision, and make sure tenant's personal property is protected? Additionally, those padlocks are coming off, what do I replace them with?